Write any three experimental observations of photoelectric effect

Explanation

Detailed Answer:
The process of photoelectric emission is instantaneous.
(i) The process of photoelectric emission in instantaneous.
(ii) The minimum kinetic energy of the photoelectrons increases with the increase in the frequency of incident light, roved the frequency of incident light is greater than the threshold frequency.
(iii) The number of photoelectrons emitted per second by a substance is directly proportional to the intensity of incident light greater than the threshold frequency.
(iv) For a given substance, there is a minimum frequency of incident light called threshold frequency, below which no photoelectric emission takes place.
(v) Photoelectric current is directly proportional to intensity of incident radiation.